JPH08141693A - Formation of sliding surface, synchronizing ring formed by utilizing this formation and manufacture of synchronizing ring - Google Patents

Abstract

PURPOSE: To form a sliding surface in high precision even if there is dimensional error in each member by putting a different kind of metal-made sliding blank against a metal-made main body having almost the uniform depth of an unfill part on the sliding surface and forged-forming. CONSTITUTION: The main body blank W4 is set in a lower die 18 and the sliding blank 17 is fitted or in the case of being impossible to fit the sliding blank 17, the sliding blank 17 is put against the opening part of the main body blank W4 and an inner punch 19 is pressed into the sliding blank 17. The outer periphery of the sliding blank 17 is bulged by expanding the inner diameter and advanced into the cut-off part 13 and also, press-stuck on the inner peripheral surface of the main body blank W4 and further, firmly combined by pressing with an outer punch 20 to improve the precision of a tooth-form 14. The main body blank W4 and the sliding blank 17 are firmly combined by remaining burr on the inner peripheral surface of the main body blank W4 . In such a way, the sliding surface can be formed in the high precision at one process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a method for forming a sliding surface, in which a sliding surface made of a metal material different from that of the main body is integrally formed on a metal main body, and the method is used. The present invention relates to a synchronizer ring formed by the method and a method for manufacturing the synchronizer ring.

[0002]

2. Description of the Related Art For a slide member sliding along a rail and a ring-shaped member moving along an axis, a metal material having characteristics suitable for respective functions and mechanical requirements is used.
The sliding surface (bearing surface) is formed of a material having excellent sliding characteristics. Conventionally, in the case of a slider, a sliding plate is screwed to the sliding surface.In a synchronizer ring used for a transmission, a resin layer is coated on the inner peripheral surface which is a shaft insertion hole, or a copper-made material is used. The bush is fitted and integrated by fixing with a pin or caulking means.

[0003]

A product formed by combining two kinds of members must process each member with high accuracy and requires an assembling step for integration. Thorough manufacturing control was required, many manufacturing processes were complicated, and high costs were inevitable.

[0004]

DISCLOSURE OF THE INVENTION The present invention aims to simplify the process by integrating products at the same time as molding, and the first invention is that the entire sliding surface has a substantially uniform depth. In the flesh-shaped part of the metal body material lacking in thickness, the metal sliding material having a thickness larger than the flesh depth and different from the body is applied, and the body and the sliding material are integrated. It is a method of forming a sliding surface in which a sliding surface of a sliding material is formed on the main body by forging into a desired shape. A second invention is a synchronizer ring in which a bush made of a different metal is pressure-bonded to an inner peripheral surface of a metal main body whose outer peripheral surface has a tooth profile.
The first invention is used for molding. Furthermore, a third aspect of the invention is to set a ring-shaped material with a partition into the lower mold,
While punching the partition with a punching punch and surrounding a burr on the inner surface of the punching mark, pressing the upper mold, intermittently engraving a plurality of notches on the inner periphery at the time of opening, in that way A method for producing a synchronizer ring in which a tubular sliding material is fitted into the formed body material and a punch is press-fitted into the fitted sliding material to crimp the sliding material onto the inner peripheral surface of the body material. is there.

[0005]

According to the first aspect of the present invention, the main body material and the sliding material are integrally combined in one step, and even if there is a slight dimensional error between the materials, the error is absorbed during the forging process. Since it ends up, the final product is molded with high precision. Further, according to the second and third inventions, by using the forging means, the main body and the sliding portion are integrated at the same time when the tooth profile is formed. In particular, in the third invention, the notch and the burr make it high. The binding force is exerted.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for forming a sliding surface, a synchronizer ring formed by using the method, and a method for manufacturing the synchronizer ring according to the present invention will be described with reference to the drawings. First, a method of forming a sliding surface will be described by taking a slider having a simple shape as an example. W is a main body material of the slider, and this main body material W is uniformly thinned on the sliding surface side by a depth of several millimeters indicated by a chain double-dashed line with respect to the product shape. A rough relief fine relief 1 is provided. Reference numeral 2 is a sliding material made of a material different from that of the main body material W, and is thicker than the thickness lacking depth L and has a size that covers substantially the entire area of the thickness reducing surface (a in FIG. 1).

The sliding material 2 is brought into close contact with the thin wall surface of the main body material W, set in the die 3 and pressed by the punch 4 (b in FIG. 1). By pressing, the sliding material 2 is pressure-bonded to the thin wall surface of the main body material W, the outer shape is formed into a shape that is faithful to the cavity shape of the die 3, and both materials W and 2 are integrally combined to form a sliding surface. Is a structure formed of the sliding material 2 (c in FIG. 1). The crimping surface between the sliding material 2 and the main body material W has a large contact area because it is combined with the uneven undulations 1 provided on the main body material W, and due to the deformation during the forging process, they are complicatedly interlocked with each other to achieve a high joining effect. To be demonstrated. The dimensions and shapes of the two materials W and 2 are not limited in relation to the product, and for example, a disk-shaped material may be used for a flat plate having a rectangular product shape and deformed into a desired shape in the forging process.

Next, the molding of the synchronizer ring using the method for forming the sliding surface will be described. W ₁ shown in FIG. 2A is an iron material obtained by cutting a round bar. First, by crushing the material W ₁ , a ring-shaped material W ₂ with a partition 5 as shown in FIG. 2B is obtained. Formed from the ring-shaped material W ₂ , as shown in FIG. 2C, an intermediate material W ₃ having protrusions 6, 6 ... Which do not meet the desired tooth profile on the outer peripheral surface of the large diameter portion of the two-stage ring. To do. Next, the intermediate material W ₃
Is set in the lower die 8 having tooth profile forming teeth 7, 7 ... on its inner circumference (b in FIG. 3), and the intermediate partition 5 is punched by a punching punch 9 at the same time or subsequently, Material W
_The upper die 12 having the convex portions 11, 11 ...
· A plurality of notches 13, 13 · · are engraved on the inner periphery of the opening of _{3, and} the protrusions 6, 6 · · are pushed into the tooth profile forming tooth mold 7, 7 · · · and the outer peripheral surface A tooth profile 14 is formed so as to overhang, and this is used as a main body material W ₄ (c in FIG. 3).
In the step of punching the partition 5 by the punching punch 9, as shown in the drawing, the diameter of the punching punch 9 is made smaller than the inner diameter of the ring-shaped material W ₂ , or the ridge 15 is formed on the bottom of the cavity along the periphery of the punched hole. As shown in FIG. 4, the flash 16 is intentionally devised so that the burr 16 remains on the punched surface by surrounding it.

Reference numeral 17 is a cylindrical sliding material, the inner circumference of which is smaller than the shaft insertion hole of the product and the outer circumference of which is loosely fit or press fit into the body material W ₄ . The main body material W ₄ is set in the same lower mold 18 as the lower mold 9 and the sliding material 17 is fitted therein. Alternatively, when the sliding material 17 cannot be fitted, only the main body material W ₄ is formed in the lower mold. When the sliding material 17 is applied to the opening of the main body material W ₄ with the inner punch 19 being press-fitted into the sliding material 17 while being set inside the sliding material 18, the sliding material 17 is expanded along with the expansion of the inner diameter. The outer circumference bulges and enters into the notches 13, 13 ... And is pressed against the inner peripheral surface of the main body material and further pressed by the outer punch 20 so that they are more firmly connected and the accuracy of the tooth profile 14 is improved. Is increased. In the case of this embodiment,
By forming the notch 13 and punching out the partition 6, a burr 16 is left on the inner peripheral surface of the main body material W ₄ , so that the main body material W ₄ and the sliding material 17 are firmly joined by the burr 16. Then, the synchronizer ring M shown in FIG. 6 is completed.

As described above, the main body material and the sliding material are combined in one process, and at the same time, the tooth profile is corrected to improve the accuracy of the gear, and the reliability of the integrated product is guaranteed by the forging technology. To be done.

According to the method of the present invention, since different kinds of metallic materials can be integrally bonded at the same time as molding, it is possible to provide a highly reliable product with a reduced number of steps.
Further, when applied to the synchronizer ring, the tooth profile forming process can be efficiently utilized. Furthermore, it is a high-precision product that has a sense of unity, and inherits the advantages of forged gears in terms of quality and functionality.

[0012]

According to the first aspect of the present invention, even if the dimensional error of each member is large, the dimensional error is eliminated at the final molding stage, and the members are formed with high accuracy. According to the second aspect of the invention, since the inner peripheral surface is formed of the sliding material, it is not necessary to assemble. According to the third aspect, the molding of the sliding surface is completed in one step at the same time as the correction of the tooth profile, and the degree of coupling between the main body and the sliding member is high due to the notch and the burr.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a method for forming a sliding surface according to the present invention.

FIG. 2 is an explanatory diagram of a step of forming an intermediate material W ₃ in the method for molding a synchronizer ring according to the present invention.

FIG. 3 is an explanatory view of a step of molding a main body material W ₄ in the method of molding a synchronizer ring according to the present invention.

FIG. 4 is an explanatory diagram of a main body material W ₄ .

FIG. 5 is an explanatory view of the step of joining the sliding member W ₄ in the method for molding the synchronizer ring according to the present invention.

FIG. 6 is an explanatory diagram of a completed synchronizer ring.

[Explanation of symbols]

W ・ ・ Main body material, W ₁・ ・ Material, W ₂・ ・ Ring material, W ₃・ ・ Intermediate material, W ₄・ ・ Main body material, M ・ ・ Synchronizer ring, L ・ ・ Depth of depth・ Asperity relief
2 ・ ・ Sliding material, 3 ・ ・ Die, 4 ・ ・ Punch, 5 ・ ・ Partitioner, 6 ・ ・ Convex part, 7 ・ ・ Tooth profile forming tooth mold, 8 ・ ・ Lower mold, 9 ・ ・ Punching punch, 10 ... punch, 11 ...
Convex part, 12 ... Upper mold, 13 ... Notch, 14 ... Tooth profile, 15 ... Convex ridge, 16 ... Burr, 17 ... Sliding material,
18 ・ ・ Lower type, 19 ・ ・ Inner punch, 20 ・ ・ Outer punch.

Claims (3)

[Claims] 1. A metal body material, which is made of metal having a thickness that is substantially uniform over the entire sliding surface, is thicker than the thickness of the metal body, and is made of a metal different from that of the body. A method for forming a sliding surface, characterized in that the sliding material is forged into a desired shape with the sliding material applied, and a sliding surface made of the sliding material is integrally formed on the main body. 2. A synchronizer ring in which a bush of a dissimilar metal is pressure-bonded to an inner peripheral surface of a ring-shaped metal body having a tooth profile formed on the outer peripheral surface by the method of forming the sliding surface. 3. A ring-shaped material with a partition is set in a lower mold, the partition is punched by a punching punch, a burr is provided around the inner surface of the punching mark, and the upper mold is pressed to open the burr. By intermittently engraving a plurality of notches on the inner circumference of the, the body material thus formed is fitted with a cylindrical sliding material, and the punch is press-fitted into the fitted sliding material. A method for manufacturing a synchronizer ring, characterized in that a sliding material is pressure-bonded to the inner peripheral surface of the main body material.